144840 has 64 divisors (see below), whose sum is σ = 466560. Its totient is φ = 35840.

The previous prime is 144839. The next prime is 144847. The reversal of 144840 is 48441.

144840 = T₂₅ + T₂₆ + ... + T₉₅.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2005 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (7290).

2¹⁴⁴⁸⁴⁰ is an apocalyptic number.

144840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233280).

144840 is an abundant number, since it is smaller than the sum of its proper divisors (321720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144840 is a wasteful number, since it uses less digits than its factorization.

144840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 144840 is about 380.5785070127. The cubic root of 144840 is about 52.5165480715.

The spelling of 144840 in words is "one hundred forty-four thousand, eight hundred forty".